Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 162 for “"slug"”.
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Entrance effects in a developing slug flow
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1960.
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Nonlinear effects on interfacial wave growth into slug flow
It is known that when two fluids flow through a horizontal channel, depending on the relative velocity between the two fluids, two different instability mechanisms can create initial wave disturbances on the interface: the classic Kelvin-Helmholtz instability or shear induced instability. These …
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Slug Formation and Frequency of Slugging in Gas-Liquid Flows
When a slug forms, the liquid level in a large length of pipe drops as the slug propagates downstream. Thus two time scales enter the slug frequency analysis: one characterizing wave evolution and one involving liquid buildup. When the Froude number of the stratified flow in a horizontal pipe at …
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The transition from two phase bubble flow to slug flow
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
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Multiphase slug flow characteristics and their effects on corrosion in pipelines
The study of corrosion in multiphase pipelines is usually conducted in the laboratory using single phase test systems. The results from these tests are often extrapolated to large diameter pipelines. Great errors can occur in this process.
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Analysis of Slug Tests to Determine Hydraulic Conductivity of Vertical Cutoff Walls
The primary contribution made in this research is to develop two new methods to evaluate hydraulic conductivity in a cutoff wall considering the compressibility of the backfill material and the proximity of the wall boundaries to the well. One of the new methods involves a series of type curves …
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Bioprospecting novel hemicellulases from the gut microbiota of the common black slug (Arion ater)
… the output from the metagenomic analysis of the slug-gut microbiota was explored in search of novel enzymes targeting the hemicellulose fraction of LCB. Genes from the metagenomic library (designated as Gene_id_(2151, 10239, 35667, 40363, and 5461)) and predicted to belong to the glycosyhydrolase …
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The consequences of gas slug ascent in a stratified magma on Strombolian eruption dynamics
… results from the bursting of large gas pockets (slugs) following ascent through relatively low-viscosity magma within the volcanic conduit. However, this paradigm was forged when the complex rheology of the magma at Stromboli, the model-type volcano for this activity, was still poorly …
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A mechanistic investigation of nonlinear interfacial instabilities leading to slug formation in multiphase flows
… eventually evolve into large amplitude waves and slugs. Detailed investigations demonstrate the effectiveness of this mechanism in flows ranging from ideal (potential) to turbulent two-phase flows. This thesis consists of three key focus areas. The first section develops a nonlinear potential flow …
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Effects of Farm Management Practices on Pest Slugs and Slug Predators in Field Crops
… in moderate to severe damage to field crops by slugs. Conserving, and even enhancing, natural enemy populations is a desirable way to manage slug infestations because remedial control measures are limited. To better understand how cover crop usage and tillage practices affect slug and natural …
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THE STATUS OF INVASIVE DUSKY SLUG (ARION) SPECIES IN THE UPPER GREAT LAKES: A MOLECULAR APPROACH
<p>I update the distribution of two cryptic slug species, <em>Arion fuscus </em>and <em>Arion subfuscus</em>,<em> </em>in the Upper Great Lakes of the United States using molecular identification methods. <em>Arion fuscus </em>has not previously been reported in the literature in this region, and …
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Reciprocal interactions between feeding and turning motor networks mediate foraging decisions in a predatory sea-slug
… and learning. As a generalist predator, the sea-slug Pleurobranchaea californica confronts a variety of approach-avoidance foraging decisions. Its simple nervous system and behaviors have enabled the neural correlates of these foraging decisions, including those related to sensation, feeding, and …
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Prey avoidance learning and neuronal elements mediating behavioral switching in the predatory sea-slug Pleurobranchaea californica
… approach in investigating how the predatory sea-slug Pleurobranchaea californica makes behavioral choices. Pleurobranchaea is a predatory generalist that surveys its environment for potential prey in a trial-and-error fashion. When encountering the Nudibranch Flabellina iodinea and its noxious …
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A study of Taylor bubbles in vertical and inclined slug flow using multiphase CFD with level set
Slug flow commonly occurs in gas and oil systems. Current predictive methods are based on mechanistic models, which require the use of closure relations to complement the conservation equations to predict integral flow parameters such as liquid holdup (or void fraction) and pressure gradient. These …
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An analysis of the pressure drop and void for a two-phase slug flow in inclined pipes.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1969.
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Application of the polynomial chaos expansion to multiphase CFD : a study of rising bubbles and slug flow
… study of the numerical simulation of capillary slug flow. We review existing correlations for the thickness of the liquid film surrounding a Taylor bubble and the pressure drop across the bubble. Bretherton's lubrication analysis, which yields analytical predictions for these quantities when …
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A Numerical Approach for Oil Slug Mobilization in a Capillary Tube Under Absence and Presence of External Excitations
… mobilization of an oil drop, also known as a \slug", via the aid of a water film. This differs from other work in this area wherein the oil drop is forced through the throat of a pore using external excitations. In the first simulation, an oil drop is placed in a small diameter tube filled with …
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Mechanistic study of slug formation and evolution in high-viscosity-liquid/High-density-gas multiphase flows in channels/pipes
… evolution of interfacial waves leading to slugging in concurrent high-viscosity (laminar) liquid/high-density(turbulent) gas two-phase flows in horizontal channels/pipes. We first develop a Fully-Coupled Immersed Flow (FCIF) solver for the three-dimensional simulation of fluid-fluid …
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THE ROLE OF TIGHT JUNCTION PROTEIN ZO-2 IN THE NUCLEUS AND ITS LINK TO TRANSCRIPTION FACTORS OF THE SLUG/SNAIL FAMILY
ZO-2 is an adaptor protein that is associated with the transmembrane proteins of the tight junction (TJ). It is capable of shuttling between the TJ and the nucleus and is known to participate in gene regulation through its association with gene regulators. To identify proteins interacting with …
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